CoreData context.save() changes not showing up

Question

Created Apr ’22

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I have an edit profile page that has a done button which uses .PopViewController after storing all the new information in CoreData. However, the profile/coredata does not update as it should unless I completely close the app and reopen it.

@IBAction func doneEditing(_ sender: Any) {
    let appDelegate = UIApplication.shared.delegate as! AppDelegate
    let context = appDelegate.persistentContainer.viewContext
    let entity = NSEntityDescription.entity(forEntityName: "Profile", in: context)
    let newProfile = NSManagedObject(entity: entity!, insertInto: context)
    newProfile.setValue(userFavMeal.text, forKey: "favMeal")
    newProfile.setValue(userRestaurant.text, forKey: "favRest")
    newProfile.setValue(userAllergies.text, forKey: "allergies")
    newProfile.setValue(gradYear.text, forKey: "gradYear")
   
    do {
      try context.save()
    } catch {
      print("Error - CoreData Saving Failed")
    }
     self.navigationController?.popViewController(animated: true)  
  }

Could someone help me figure out how to have the data instantly refresh? I tried instantiating a new ViewController upon clicking the done button but that caused problems with constraints (although it worked).

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Answer 1

deeje OP

Apr ’22

the real question is, how are you displaying your profiles? Are you using FetchedResultsControllers? If yes, you need to create and save a new profile in a background context, which will then notify the FRC and (if you've wired the FRC up properly) update your UI.

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